Fr.: relaxation sans rayonnement
A process in which a molecule relaxes without emitting a → photon.
Fr.: rayonnement de recombinaison
Radiation produced when a free electron in a plasma is captured by an ionized atom.
Fr.: rayonnement solaire
All the constituents making up the Sun's emission: photons, electrons, protons, neutrinos, and atomic nuclei.
solar radiation pressure
fešâr-e tâbeš xoršid (#)
Fr.: pression du rayonnement solaire
Fr.: rayonnement sub-millimétrique
Fr.: rayonnement synchrotron
The electromagnetic radiation emitted by high-energy particles that are moving in magnetic fields, as in a synchrotron particle accelerator. The acceleration of the moving charges causes the particles to emit radiation. Radio galaxies and supernova remnants are intense sources of synchrotron radiation. Characteristics of synchrotron radiation are its high degree of polarization and nonthermal spectrum.
tâbeš-e garmâyi (#)
Fr.: rayonnement thermique
The energy radiated from an object in the form of → electromagnetic waves as a result of its → temperature. Thermal radiation ranges in → wavelength from the longest → infrared radiation through the → visible light spectrum to the shortest → ultraviolet rays. In opposition, → non-thermal radiation is caused by energetic particles.